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Is fb-watchman ESM-only? Can you require() it?

Bindings for the Watchman file watching service

Last verified Sep 9, 2026 against fb-watchman@2.0.2. JSON

CommonJS CommonJS — require() works on every Node.js version

fb-watchman ships CommonJS only. require("fb-watchman") works everywhere. import "fb-watchman" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

Latest
2.0.2 (Sep 21, 2022)
Module format
CommonJS
Last CommonJS version
2.0.2
TypeScript types
@types/fb-watchman
Node engines
not declared
Weekly downloads
44.4M
License
Apache-2.0

Does fb-watchman@2.0.2 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("fb-watchman") from a CommonJS file and import "fb-watchman" from an ES module.

Runtimerequire("fb-watchman")import "fb-watchman"
Node.js 18✓ works✓ works
Node.js 20✓ works✓ works
Node.js 22✓ works✓ works
Node.js 24✓ works✓ works
Node.js 26✓ works✓ works
Bun 1.4✓ works✓ works

How to import fb-watchman

ES modules (import)

import fbWatchman from "fb-watchman";

Named imports from a CommonJS package only work when Node.js can statically detect them. If a named import fails, use the default import and destructure.

CommonJS (require)

const fbWatchman = require("fb-watchman");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (17 versions; the newest 17 shown).

VersionsFormatFirst published
0.0.0 – 2.0.2CommonJSNov 3, 2014

Frequently asked

Is fb-watchman ESM-only?

fb-watchman@2.0.2 is a CommonJS package. fb-watchman ships CommonJS only. require("fb-watchman") works everywhere. import "fb-watchman" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

Can I import fb-watchman with ES module syntax?

Yes. import fbWatchman from "fb-watchman" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

Does fb-watchman work in Bun?

Yes. import "fb-watchman" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does fb-watchman ship TypeScript types?

Not bundled. Install the community types with "npm install -D @types/fb-watchman".

Links

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